static void cc_start_transport_op(grpc_exec_ctx *exec_ctx,
grpc_channel_element *elem,
grpc_transport_op *op) {
channel_data *chand = elem->channel_data;
grpc_exec_ctx_sched(exec_ctx, op->on_consumed, GRPC_ERROR_NONE, NULL);
GPR_ASSERT(op->set_accept_stream == false);
if (op->bind_pollset != NULL) {
grpc_pollset_set_add_pollset(exec_ctx, chand->interested_parties,
op->bind_pollset);
}
gpr_mu_lock(&chand->mu);
if (op->on_connectivity_state_change != NULL) {
grpc_connectivity_state_notify_on_state_change(
exec_ctx, &chand->state_tracker, op->connectivity_state,
op->on_connectivity_state_change);
op->on_connectivity_state_change = NULL;
op->connectivity_state = NULL;
}
if (op->send_ping != NULL) {
if (chand->lb_policy == NULL) {
grpc_exec_ctx_sched(exec_ctx, op->send_ping,
GRPC_ERROR_CREATE("Ping with no load balancing"),
NULL);
} else {
grpc_lb_policy_ping_one(exec_ctx, chand->lb_policy, op->send_ping);
op->bind_pollset = NULL;
}
op->send_ping = NULL;
}
if (op->disconnect_with_error != GRPC_ERROR_NONE) {
if (chand->resolver != NULL) {
set_channel_connectivity_state_locked(
exec_ctx, chand, GRPC_CHANNEL_SHUTDOWN,
GRPC_ERROR_REF(op->disconnect_with_error), "disconnect");
grpc_resolver_shutdown(exec_ctx, chand->resolver);
GRPC_RESOLVER_UNREF(exec_ctx, chand->resolver, "channel");
chand->resolver = NULL;
if (!chand->started_resolving) {
grpc_closure_list_fail_all(&chand->waiting_for_config_closures,
GRPC_ERROR_REF(op->disconnect_with_error));
grpc_exec_ctx_enqueue_list(exec_ctx,
&chand->waiting_for_config_closures, NULL);
}
if (chand->lb_policy != NULL) {
grpc_pollset_set_del_pollset_set(exec_ctx,
chand->lb_policy->interested_parties,
chand->interested_parties);
GRPC_LB_POLICY_UNREF(exec_ctx, chand->lb_policy, "channel");
chand->lb_policy = NULL;
}
}
GRPC_ERROR_UNREF(op->disconnect_with_error);
}
gpr_mu_unlock(&chand->mu);
}
static void internal_request_begin(
grpc_exec_ctx *exec_ctx, grpc_httpcli_context *context,
grpc_pollset *pollset, const grpc_httpcli_request *request,
gpr_timespec deadline, grpc_httpcli_response_cb on_response,
void *user_data, const char *name, gpr_slice request_text) {
internal_request *req = gpr_malloc(sizeof(internal_request));
memset(req, 0, sizeof(*req));
req->request_text = request_text;
grpc_httpcli_parser_init(&req->parser);
req->on_response = on_response;
req->user_data = user_data;
req->deadline = deadline;
req->handshaker =
request->handshaker ? request->handshaker : &grpc_httpcli_plaintext;
req->context = context;
req->pollset = pollset;
grpc_closure_init(&req->on_read, on_read, req);
grpc_closure_init(&req->done_write, done_write, req);
gpr_slice_buffer_init(&req->incoming);
gpr_slice_buffer_init(&req->outgoing);
grpc_iomgr_register_object(&req->iomgr_obj, name);
req->host = gpr_strdup(request->host);
req->ssl_host_override = gpr_strdup(request->ssl_host_override);
grpc_pollset_set_add_pollset(exec_ctx, &req->context->pollset_set,
req->pollset);
grpc_resolve_address(request->host, req->handshaker->default_port,
on_resolved, req);
}
void grpc_httpcli_post(grpc_httpcli_context *context, grpc_pollset *pollset,
const grpc_httpcli_request *request,
const char *body_bytes, size_t body_size,
gpr_timespec deadline,
grpc_httpcli_response_cb on_response, void *user_data) {
internal_request *req;
char *name;
if (g_post_override && g_post_override(request, body_bytes, body_size,
deadline, on_response, user_data)) {
return;
}
req = gpr_malloc(sizeof(internal_request));
memset(req, 0, sizeof(*req));
req->request_text =
grpc_httpcli_format_post_request(request, body_bytes, body_size);
grpc_httpcli_parser_init(&req->parser);
req->on_response = on_response;
req->user_data = user_data;
req->deadline = deadline;
req->use_ssl = request->use_ssl;
req->context = context;
req->pollset = pollset;
gpr_asprintf(&name, "HTTP:GET:%s:%s", request->host, request->path);
grpc_iomgr_register_object(&req->iomgr_obj, name);
gpr_free(name);
if (req->use_ssl) {
req->host = gpr_strdup(request->host);
}
grpc_pollset_set_add_pollset(&req->context->pollset_set, req->pollset);
grpc_resolve_address(request->host, req->use_ssl ? "https" : "http",
on_resolved, req);
}
static void on_accept(grpc_exec_ctx* exec_ctx, void* arg,
grpc_endpoint* endpoint, grpc_pollset* accepting_pollset,
grpc_tcp_server_acceptor* acceptor) {
grpc_end2end_http_proxy* proxy = arg;
// Instantiate proxy_connection.
proxy_connection* conn = gpr_malloc(sizeof(*conn));
memset(conn, 0, sizeof(*conn));
conn->client_endpoint = endpoint;
gpr_ref_init(&conn->refcount, 1);
conn->pollset_set = grpc_pollset_set_create();
grpc_pollset_set_add_pollset(exec_ctx, conn->pollset_set, proxy->pollset);
grpc_closure_init(&conn->on_read_request_done, on_read_request_done, conn);
grpc_closure_init(&conn->on_server_connect_done, on_server_connect_done,
conn);
grpc_closure_init(&conn->on_write_response_done, on_write_response_done,
conn);
grpc_closure_init(&conn->on_client_read_done, on_client_read_done, conn);
grpc_closure_init(&conn->on_client_write_done, on_client_write_done, conn);
grpc_closure_init(&conn->on_server_read_done, on_server_read_done, conn);
grpc_closure_init(&conn->on_server_write_done, on_server_write_done, conn);
grpc_slice_buffer_init(&conn->client_read_buffer);
grpc_slice_buffer_init(&conn->client_deferred_write_buffer);
grpc_slice_buffer_init(&conn->client_write_buffer);
grpc_slice_buffer_init(&conn->server_read_buffer);
grpc_slice_buffer_init(&conn->server_deferred_write_buffer);
grpc_slice_buffer_init(&conn->server_write_buffer);
grpc_http_parser_init(&conn->http_parser, GRPC_HTTP_REQUEST,
&conn->http_request);
grpc_endpoint_read(exec_ctx, conn->client_endpoint, &conn->client_read_buffer,
&conn->on_read_request_done);
}
int rr_pick(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol, grpc_pollset *pollset,
grpc_metadata_batch *initial_metadata,
grpc_connected_subchannel **target, grpc_closure *on_complete) {
round_robin_lb_policy *p = (round_robin_lb_policy *)pol;
pending_pick *pp;
ready_list *selected;
gpr_mu_lock(&p->mu);
if ((selected = peek_next_connected_locked(p))) {
gpr_mu_unlock(&p->mu);
*target = grpc_subchannel_get_connected_subchannel(selected->subchannel);
if (grpc_lb_round_robin_trace) {
gpr_log(GPR_DEBUG,
"[RR PICK] TARGET <-- CONNECTED SUBCHANNEL %p (NODE %p)",
selected->subchannel, selected);
}
/* only advance the last picked pointer if the selection was used */
advance_last_picked_locked(p);
return 1;
} else {
if (!p->started_picking) {
start_picking(exec_ctx, p);
}
grpc_pollset_set_add_pollset(exec_ctx, p->base.interested_parties, pollset);
pp = gpr_malloc(sizeof(*pp));
pp->next = p->pending_picks;
pp->pollset = pollset;
pp->target = target;
pp->on_complete = on_complete;
p->pending_picks = pp;
gpr_mu_unlock(&p->mu);
return 0;
}
}
static grpc_connected_subchannel *connect_subchannel(grpc_subchannel *c) {
grpc_pollset pollset;
grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
grpc_pollset_init(&pollset);
grpc_pollset_set_init(&g_interested_parties);
grpc_pollset_set_add_pollset(&exec_ctx, &g_interested_parties, &pollset);
grpc_subchannel_notify_on_state_change(&exec_ctx, c, &g_interested_parties,
&g_state,
grpc_closure_create(state_changed, c));
grpc_exec_ctx_flush(&exec_ctx);
gpr_mu_lock(GRPC_POLLSET_MU(&pollset));
while (g_state != GRPC_CHANNEL_READY) {
grpc_pollset_worker worker;
grpc_pollset_work(&exec_ctx, &pollset, &worker,
gpr_now(GPR_CLOCK_MONOTONIC),
GRPC_TIMEOUT_SECONDS_TO_DEADLINE(1));
gpr_mu_unlock(GRPC_POLLSET_MU(&pollset));
grpc_exec_ctx_flush(&exec_ctx);
gpr_mu_lock(GRPC_POLLSET_MU(&pollset));
}
grpc_pollset_shutdown(&exec_ctx, &pollset,
grpc_closure_create(destroy_pollset, &pollset));
grpc_pollset_set_destroy(&g_interested_parties);
gpr_mu_unlock(GRPC_POLLSET_MU(&pollset));
grpc_exec_ctx_finish(&exec_ctx);
return grpc_subchannel_get_connected_subchannel(c);
}
void args_init(grpc_exec_ctx *exec_ctx, args_struct *args) {
gpr_event_init(&args->ev);
args->pollset = gpr_zalloc(grpc_pollset_size());
grpc_pollset_init(args->pollset, &args->mu);
args->pollset_set = grpc_pollset_set_create();
grpc_pollset_set_add_pollset(exec_ctx, args->pollset_set, args->pollset);
args->addrs = NULL;
}
/** implementation of add_interested_party for setup vtable */
static void setup_add_interested_party(grpc_transport_setup *sp,
grpc_pollset *pollset) {
grpc_client_setup *s = (grpc_client_setup *)sp;
gpr_mu_lock(&s->mu);
grpc_pollset_set_add_pollset(&s->interested_parties, pollset);
gpr_mu_unlock(&s->mu);
}
static void cc_start_transport_op(grpc_exec_ctx *exec_ctx,
grpc_channel_element *elem,
grpc_transport_op *op) {
channel_data *chand = elem->channel_data;
grpc_resolver *destroy_resolver = NULL;
grpc_exec_ctx_enqueue(exec_ctx, op->on_consumed, true, NULL);
GPR_ASSERT(op->set_accept_stream == NULL);
if (op->bind_pollset != NULL) {
grpc_pollset_set_add_pollset(exec_ctx, &chand->interested_parties,
op->bind_pollset);
}
gpr_mu_lock(&chand->mu_config);
if (op->on_connectivity_state_change != NULL) {
grpc_connectivity_state_notify_on_state_change(
exec_ctx, &chand->state_tracker, op->connectivity_state,
op->on_connectivity_state_change);
op->on_connectivity_state_change = NULL;
op->connectivity_state = NULL;
}
if (op->send_ping != NULL) {
if (chand->lb_policy == NULL) {
grpc_exec_ctx_enqueue(exec_ctx, op->send_ping, false, NULL);
} else {
grpc_lb_policy_ping_one(exec_ctx, chand->lb_policy, op->send_ping);
op->bind_pollset = NULL;
}
op->send_ping = NULL;
}
if (op->disconnect && chand->resolver != NULL) {
grpc_connectivity_state_set(exec_ctx, &chand->state_tracker,
GRPC_CHANNEL_FATAL_FAILURE, "disconnect");
destroy_resolver = chand->resolver;
chand->resolver = NULL;
if (chand->lb_policy != NULL) {
grpc_pollset_set_del_pollset_set(exec_ctx,
&chand->lb_policy->interested_parties,
&chand->interested_parties);
GRPC_LB_POLICY_UNREF(exec_ctx, chand->lb_policy, "channel");
chand->lb_policy = NULL;
}
}
gpr_mu_unlock(&chand->mu_config);
if (destroy_resolver) {
grpc_resolver_shutdown(exec_ctx, destroy_resolver);
GRPC_RESOLVER_UNREF(exec_ctx, destroy_resolver, "channel");
}
}
void grpc_polling_entity_add_to_pollset_set(grpc_exec_ctx *exec_ctx,
grpc_polling_entity *pollent,
grpc_pollset_set *pss_dst) {
if (pollent->tag == POPS_POLLSET) {
GPR_ASSERT(pollent->pollent.pollset != NULL);
grpc_pollset_set_add_pollset(exec_ctx, pss_dst, pollent->pollent.pollset);
} else if (pollent->tag == POPS_POLLSET_SET) {
GPR_ASSERT(pollent->pollent.pollset_set != NULL);
grpc_pollset_set_add_pollset_set(exec_ctx, pss_dst,
pollent->pollent.pollset_set);
} else {
gpr_log(GPR_ERROR, "Invalid grpc_polling_entity tag '%d'", pollent->tag);
abort();
}
}
void grpc_client_channel_watch_connectivity_state(
grpc_exec_ctx *exec_ctx, grpc_channel_element *elem, grpc_pollset *pollset,
grpc_connectivity_state *state, grpc_closure *on_complete) {
channel_data *chand = elem->channel_data;
external_connectivity_watcher *w = gpr_malloc(sizeof(*w));
w->chand = chand;
w->pollset = pollset;
w->on_complete = on_complete;
grpc_pollset_set_add_pollset(exec_ctx, chand->interested_parties, pollset);
grpc_closure_init(&w->my_closure, on_external_watch_complete, w);
GRPC_CHANNEL_STACK_REF(w->chand->owning_stack,
"external_connectivity_watcher");
gpr_mu_lock(&chand->mu);
grpc_connectivity_state_notify_on_state_change(
exec_ctx, &chand->state_tracker, state, &w->my_closure);
gpr_mu_unlock(&chand->mu);
}
int main(int argc, char **argv) {
grpc_closure destroyed;
grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
grpc_test_init(argc, argv);
grpc_init();
grpc_pollset_set_init(&g_pollset_set);
grpc_pollset_init(&g_pollset);
grpc_pollset_set_add_pollset(&exec_ctx, &g_pollset_set, &g_pollset);
grpc_exec_ctx_finish(&exec_ctx);
test_succeeds();
gpr_log(GPR_ERROR, "End of first test");
test_fails();
test_times_out();
grpc_pollset_set_destroy(&g_pollset_set);
grpc_closure_init(&destroyed, destroy_pollset, &g_pollset);
grpc_pollset_shutdown(&exec_ctx, &g_pollset, &destroyed);
grpc_exec_ctx_finish(&exec_ctx);
grpc_shutdown();
return 0;
}
static int pf_pick(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol,
grpc_pollset *pollset, grpc_metadata_batch *initial_metadata,
uint32_t initial_metadata_flags,
grpc_connected_subchannel **target,
grpc_closure *on_complete) {
pick_first_lb_policy *p = (pick_first_lb_policy *)pol;
pending_pick *pp;
/* Check atomically for a selected channel */
grpc_connected_subchannel *selected = GET_SELECTED(p);
if (selected != NULL) {
*target = selected;
return 1;
}
/* No subchannel selected yet, so acquire lock and then attempt again */
gpr_mu_lock(&p->mu);
selected = GET_SELECTED(p);
if (selected) {
gpr_mu_unlock(&p->mu);
*target = selected;
return 1;
} else {
if (!p->started_picking) {
start_picking(exec_ctx, p);
}
grpc_pollset_set_add_pollset(exec_ctx, p->base.interested_parties, pollset);
pp = gpr_malloc(sizeof(*pp));
pp->next = p->pending_picks;
pp->pollset = pollset;
pp->target = target;
pp->initial_metadata_flags = initial_metadata_flags;
pp->on_complete = on_complete;
p->pending_picks = pp;
gpr_mu_unlock(&p->mu);
return 0;
}
}
/* Pollset_set with an empty pollset */
void pollset_set_test_empty_pollset() {
/* We construct the following structure for this test:
*
* +---> PS0 (EMPTY)
* |
* +---> FD0
* |
* PSS0---+
* | +---> FD1
* | |
* +---> PS1--+
* |
* +---> FD2
*/
grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
grpc_pollset_worker *worker;
gpr_timespec deadline;
test_fd tfds[3];
test_pollset pollsets[2];
test_pollset_set pollset_set;
const int num_fds = GPR_ARRAY_SIZE(tfds);
const int num_ps = GPR_ARRAY_SIZE(pollsets);
const int num_pss = 1;
init_test_fds(&exec_ctx, tfds, num_fds);
init_test_pollsets(pollsets, num_ps);
init_test_pollset_sets(&pollset_set, num_pss);
/* Construct the structure */
grpc_pollset_set_add_fd(&exec_ctx, pollset_set.pss, tfds[0].fd);
grpc_pollset_add_fd(&exec_ctx, pollsets[1].ps, tfds[1].fd);
grpc_pollset_add_fd(&exec_ctx, pollsets[1].ps, tfds[2].fd);
grpc_pollset_set_add_pollset(&exec_ctx, pollset_set.pss, pollsets[0].ps);
grpc_pollset_set_add_pollset(&exec_ctx, pollset_set.pss, pollsets[1].ps);
/* Test. Make all FDs readable and make sure that can be observed by doing
* grpc_pollset_work on the empty pollset 'PS0' */
make_test_fds_readable(tfds, num_fds);
gpr_mu_lock(pollsets[0].mu);
deadline = grpc_timeout_milliseconds_to_deadline(2);
GPR_ASSERT(GRPC_ERROR_NONE ==
grpc_pollset_work(&exec_ctx, pollsets[0].ps, &worker,
gpr_now(GPR_CLOCK_MONOTONIC), deadline));
gpr_mu_unlock(pollsets[0].mu);
grpc_exec_ctx_flush(&exec_ctx);
verify_readable_and_reset(&exec_ctx, tfds, num_fds);
grpc_exec_ctx_flush(&exec_ctx);
/* Tear down */
grpc_pollset_set_del_fd(&exec_ctx, pollset_set.pss, tfds[0].fd);
grpc_pollset_set_del_pollset(&exec_ctx, pollset_set.pss, pollsets[0].ps);
grpc_pollset_set_del_pollset(&exec_ctx, pollset_set.pss, pollsets[1].ps);
grpc_exec_ctx_flush(&exec_ctx);
cleanup_test_fds(&exec_ctx, tfds, num_fds);
cleanup_test_pollsets(&exec_ctx, pollsets, num_ps);
cleanup_test_pollset_sets(&exec_ctx, &pollset_set, num_pss);
grpc_exec_ctx_finish(&exec_ctx);
}
/* Test some typical scenarios in pollset_set */
static void pollset_set_test_basic() {
/* We construct the following structure for this test:
*
* +---> FD0 (Added before PSS1, PS1 and PS2 are added to PSS0)
* |
* +---> FD5 (Added after PSS1, PS1 and PS2 are added to PSS0)
* |
* |
* | +---> FD1 (Added before PSS1 is added to PSS0)
* | |
* | +---> FD6 (Added after PSS1 is added to PSS0)
* | |
* +---> PSS1--+ +--> FD2 (Added before PS0 is added to PSS1)
* | | |
* | +---> PS0---+
* | |
* PSS0---+ +--> FD7 (Added after PS0 is added to PSS1)
* |
* |
* | +---> FD3 (Added before PS1 is added to PSS0)
* | |
* +---> PS1---+
* | |
* | +---> FD8 (Added after PS1 added to PSS0)
* |
* |
* | +---> FD4 (Added before PS2 is added to PSS0)
* | |
* +---> PS2---+
* |
* +---> FD9 (Added after PS2 is added to PSS0)
*/
grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
grpc_pollset_worker *worker;
gpr_timespec deadline;
test_fd tfds[10];
test_pollset pollsets[3];
test_pollset_set pollset_sets[2];
const int num_fds = GPR_ARRAY_SIZE(tfds);
const int num_ps = GPR_ARRAY_SIZE(pollsets);
const int num_pss = GPR_ARRAY_SIZE(pollset_sets);
init_test_fds(&exec_ctx, tfds, num_fds);
init_test_pollsets(pollsets, num_ps);
init_test_pollset_sets(pollset_sets, num_pss);
/* Construct the pollset_set/pollset/fd tree (see diagram above) */
grpc_pollset_set_add_fd(&exec_ctx, pollset_sets[0].pss, tfds[0].fd);
grpc_pollset_set_add_fd(&exec_ctx, pollset_sets[1].pss, tfds[1].fd);
grpc_pollset_add_fd(&exec_ctx, pollsets[0].ps, tfds[2].fd);
grpc_pollset_add_fd(&exec_ctx, pollsets[1].ps, tfds[3].fd);
grpc_pollset_add_fd(&exec_ctx, pollsets[2].ps, tfds[4].fd);
grpc_pollset_set_add_pollset_set(&exec_ctx, pollset_sets[0].pss,
pollset_sets[1].pss);
grpc_pollset_set_add_pollset(&exec_ctx, pollset_sets[1].pss, pollsets[0].ps);
grpc_pollset_set_add_pollset(&exec_ctx, pollset_sets[0].pss, pollsets[1].ps);
grpc_pollset_set_add_pollset(&exec_ctx, pollset_sets[0].pss, pollsets[2].ps);
grpc_pollset_set_add_fd(&exec_ctx, pollset_sets[0].pss, tfds[5].fd);
grpc_pollset_set_add_fd(&exec_ctx, pollset_sets[1].pss, tfds[6].fd);
grpc_pollset_add_fd(&exec_ctx, pollsets[0].ps, tfds[7].fd);
grpc_pollset_add_fd(&exec_ctx, pollsets[1].ps, tfds[8].fd);
grpc_pollset_add_fd(&exec_ctx, pollsets[2].ps, tfds[9].fd);
grpc_exec_ctx_flush(&exec_ctx);
/* Test that if any FD in the above structure is readable, it is observable by
* doing grpc_pollset_work on any pollset
*
* For every pollset, do the following:
* - (Ensure that all FDs are in reset state)
* - Make all FDs readable
* - Call grpc_pollset_work() on the pollset
* - Flush the exec_ctx
* - Verify that on_readable call back was called for all FDs (and
* reset the FDs)
* */
for (int i = 0; i < num_ps; i++) {
make_test_fds_readable(tfds, num_fds);
gpr_mu_lock(pollsets[i].mu);
deadline = grpc_timeout_milliseconds_to_deadline(2);
GPR_ASSERT(GRPC_ERROR_NONE ==
grpc_pollset_work(&exec_ctx, pollsets[i].ps, &worker,
gpr_now(GPR_CLOCK_MONOTONIC), deadline));
gpr_mu_unlock(pollsets[i].mu);
grpc_exec_ctx_flush(&exec_ctx);
verify_readable_and_reset(&exec_ctx, tfds, num_fds);
grpc_exec_ctx_flush(&exec_ctx);
}
/* Test tear down */
grpc_pollset_set_del_fd(&exec_ctx, pollset_sets[0].pss, tfds[0].fd);
grpc_pollset_set_del_fd(&exec_ctx, pollset_sets[0].pss, tfds[5].fd);
grpc_pollset_set_del_fd(&exec_ctx, pollset_sets[1].pss, tfds[1].fd);
grpc_pollset_set_del_fd(&exec_ctx, pollset_sets[1].pss, tfds[6].fd);
grpc_exec_ctx_flush(&exec_ctx);
grpc_pollset_set_del_pollset(&exec_ctx, pollset_sets[1].pss, pollsets[0].ps);
grpc_pollset_set_del_pollset(&exec_ctx, pollset_sets[0].pss, pollsets[1].ps);
grpc_pollset_set_del_pollset(&exec_ctx, pollset_sets[0].pss, pollsets[2].ps);
grpc_pollset_set_del_pollset_set(&exec_ctx, pollset_sets[0].pss,
pollset_sets[1].pss);
grpc_exec_ctx_flush(&exec_ctx);
cleanup_test_fds(&exec_ctx, tfds, num_fds);
cleanup_test_pollsets(&exec_ctx, pollsets, num_ps);
cleanup_test_pollset_sets(&exec_ctx, pollset_sets, num_pss);
grpc_exec_ctx_finish(&exec_ctx);
}